Okay, I hope that someone out there is finding these photo tips useful so that I’m not just posting tips and tricks for well…no one.
Today we’ll talk about Aperture. Here’s the (very) basic skinny on Aperture: As I said in some of my earlier posts, light is everything in photography. And the amount of light that enters your camera when you’re taking a picture determines what your photo will end up looking like. There are a few factors that determine HOW light enters the camera – the shutter speed, and the aperture, but we’re talking about aperture so
just forget I said anything about Shutter Speed for today and we’ll hit on that at a later time.
Aperture was a tricky concept for me to understand when i was first learning photography because it’s a little backwards. Or at least it seemed that way to me. Because the thing about it is, that when your aperture is set to a LOW number, it actually means that the opening letting in light is very WIDE. And vice versa. If the aperture is set to a high number it means that the circular opening is very SMALL. WHAT?! I know, I know. Stay with me. If the opening is wide (low number) it’s letting in lots of light and if the opening is small (high number) it’s letting in less light.
Low Aperture (like 1.8, 2.5 etc) = Wide Open/Lots of Light coming in
High Aperture (like 22) = Tightly Closed/Less Light Coming in
Okay, now that we’ve established THAT, let’s talk about how that affects the actual appearance of your photos. The value of the aperture that you choose determines the Depth of Field your picture has. Depth of Field is just a fancy way of saying what’s in focus and what’s not in focus. As a portrait photographer, I like for the majority of my photos to have a very shallow depth of field – meaning that the person (or their eyes) are sharply in focus, and the rest of the photo is out of focus, or “blurry”.
See in the example below where the subject is in focus and the trees and forest behind her are blurred:

This image was taken with an aperture of 1.8 – which is the lowest aperture setting that the lens that I was using would go. On a side note, to determine the lowest aperture setting that YOUR lens will go (if you’re using an SLR) just take a look at the printing on your lense. It will say something like 85mm f/1.2 – that means that the lowest your aperture will go when you’re using that lens in 1.2 – VERY shallow depth of field (yay!). If you’re using a point and shoot, that number will just depend on your camera.
So how do you actually change the settings on your camera to alter your aperture?? You’ll have to check your camera’s manual for exact instructions for your brand, but most cameras have a dial similar to this one. When it’s on full auto (I call it the green dummy box – because you don’t have to do anything
) t
he camera readS the light through the viewfinder and chooses all the settings for you, but if you want to have a little more control, let’s turn that dial to something else.
If you’re just getting the hang of changing your own settings, or trying it for the first time, you can turn it to to the AV (aperture value) setting. If you’re feeling brave, you can turn it to M mode (full manual) for full control over all the settings.
In AV mode, you select the Aperture and the camera chooses everything else for you (ISO, Shutterspeed, etc) based on what you’re photographing. Turn the wheel on your camera (mine is located in the back, but yours might be on top or on the side) and look at the settings until you see the number changing around (1.8, 3.5, 5.6, 10, etc).
Here’s some examples of what the different settings do:
In the image below, I set up Optimus Prime, R2D2, and Mike Wazowski in a row, about 2 inches apart. It was taken with an aperture of 1.8. (Shutterspeed 1/2500, ISO400). Since the aperture is set very low, the camera is letting in a lot of light, and the depth of field is very shallow, so only Mike Wazowski is in focus.

Here, these 3 pictures were all taken within about 4 seconds. The settings are the same, my camera didn’t move. The only thing that changed was the object that I chose to focus on.

Here’s what happens when I increase the aperture.
F/3.5

F/5.6

F/9.0

F/22

Did you see it? I kept the focus on Mike Wazowski, but as the aperture value increased, everything behind him became more in focus as the aperture was increased. Here they are side by side for comparison:

And here’s a low aperture in an actual portrait, with PEOPLE.

Go forth and try it and let me know how you do!
Soon, you too can take pictures with a lovely smooth background like this:

Does it make sense? Did I explain it well enough?? Any questions??